Portão climate — normals and trends

Q: What is the climate of Portão?

Portão has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 19.2 °C and it receives 1,649 mm of precipitation per year.

Q: What is the hottest day ever recorded in Portão?

The hottest day measured in Portão between 1940 and 2025 was 16 November 1985, reaching 39.7 °C.

Q: What is the coldest day in Portão?

The coldest day measured in Portão between 1940 and 2025 was 25 July 2009, at -2.4 °C.

Q: Does it snow in Portão?

Almost never: Portão sees virtually no snow, with about 0 frost days per year.

Q: Has the climate of Portão warmed?

Yes: Portão warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Portão?

The wettest day measured in Portão between 1940 and 2025 was 24 March 2010, with 107 mm of rain in 24 hours.

Q: What was the windiest day in Portão?

The windiest day measured in Portão between 1940 and 2025 was 2 July 1983, with winds reaching 43.3 km/h.

Q: What is the warmest month in Portão?

The warmest month in Portão is January (24.2 °C on average); the coldest is July (14.0 °C).

Q: How much does it rain in Portão?

Portão receives on average 1,649 mm of precipitation per year, spread over about 146 rainy days.

Q: Is it sunny in Portão?

Portão gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.

Portão (Brazil) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 19.2 °C and it receives 1,649 mm of precipitation per year.

These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.

The warmest month is January (24.2 °C on average) and the coldest is July (14.0 °C). Rainfall peaks in September.

Portão averages 0 frost days, 53 hot days (≥ 30 °C) and 146 rainy days per year.

Portão has warmed by +0.8 °C between 1940 and 2025, or +0.09 °C per decade. This trend is statistically significant.

The hottest day of the period reached 39.7 °C (on 16 November 1985) and the coldest -2.4 °C (on 25 July 2009).

Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.

Climate normals · ERA5

PortãoRio Grande do Sul

coords: -29.70°, -51.24°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJanuaryColdest monthJulyWettest monthSeptemberDriest monthApril

Mean daily temperature

19.2°C

Average daily high

24.2°C

Average daily low

15.0°C

Annual rainfall

1,649mm

Sunshine / day

8.8h

Mean relative humidity

80%

Average peak wind

14.0km/h

Seasonal range

10.2°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

53 d/yr

Rainy days (≥ 1 mm)

146 d/yr

Annual snowfall

0.0 cm

Average feels-like high

26.2 °C

Average feels-like low

15.2 °C

Average peak gust

30.4 km/h

Tropical nights (≥ 20 °C)

57 d/yr

Solar radiation

15.9 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+0.8 °C

since 1940

+0.1 °C per decade · r² = 0.20 · p = < 0.001

19402025

Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).

A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.

Records for the period

Hottest day

39.7 °C

16 November 1985

Coldest day

-2.4 °C

25 July 2009

Wettest day

107 mm

24 March 2010

Windiest day

43.3 km/h

2 July 1983

Strongest gust

92.5 km/h

2 July 1983

Hottest feels-like

45.6 °C

7 February 2014

Coldest feels-like

-5.8 °C

25 July 2009

Sunniest day

13.6 h

14 December 2025

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	38.1 °C11 February 2025	0.6 °C2 July 2025	19.5 °C	1,613 mm	78	0
2024	37.2 °C12 February 2024	2.6 °C1 July 2024	20.0 °C	1,996 mm	65	0
2023	38.5 °C13 February 2023	2.5 °C28 August 2023	20.1 °C	2,029 mm	84	0
2022	38.2 °C22 January 2022	2.7 °C19 June 2022	19.0 °C	1,553 mm	66	0
2021	36.4 °C11 January 2021	0.9 °C30 July 2021	19.3 °C	1,202 mm	60	0
2020	37.0 °C11 December 2020	1.5 °C15 July 2020	19.5 °C	1,305 mm	72	0
2019	38.4 °C2 January 2019	0.5 °C7 July 2019	20.3 °C	1,470 mm	82	0
2018	37.3 °C11 December 2018	1.0 °C17 June 2018	19.7 °C	1,509 mm	61	0
2017	35.5 °C18 February 2017	0.9 °C19 July 2017	20.5 °C	1,765 mm	71	0
2016	36.1 °C25 January 2016	0.5 °C13 June 2016	19.2 °C	1,419 mm	71	0
2015	35.0 °C6 January 2015	3.0 °C16 June 2015	20.1 °C	2,119 mm	53	0
2014	38.9 °C5 February 2014	1.4 °C14 August 2014	20.0 °C	1,869 mm	72	0
2013	37.7 °C26 December 2013	0.7 °C25 July 2013	19.0 °C	1,620 mm	58	0
2012	38.1 °C25 December 2012	-1.4 °C9 June 2012	20.1 °C	1,357 mm	90	2
2011	36.3 °C22 December 2011	-0.4 °C5 July 2011	19.0 °C	1,706 mm	54	2
2010	38.1 °C3 February 2010	0.6 °C15 July 2010	19.2 °C	1,834 mm	56	0
2009	34.9 °C1 November 2009	-2.4 °C25 July 2009	19.0 °C	1,679 mm	59	3
2008	35.3 °C10 January 2008	0.8 °C17 June 2008	18.8 °C	1,680 mm	52	0
2007	36.3 °C30 March 2007	0.5 °C12 July 2007	19.4 °C	1,921 mm	81	0
2006	38.5 °C8 January 2006	1.1 °C22 August 2006	19.6 °C	1,397 mm	68	0
2005	37.7 °C8 March 2005	1.4 °C20 July 2005	19.9 °C	1,549 mm	90	0
2004	35.9 °C6 September 2004	0.3 °C14 June 2004	19.0 °C	1,317 mm	51	0
2003	36.3 °C4 February 2003	0.9 °C12 July 2003	19.4 °C	1,697 mm	58	0
2002	35.9 °C10 March 2002	1.6 °C25 June 2002	19.9 °C	2,068 mm	69	0
2001	34.8 °C18 January 2001	2.0 °C22 June 2001	20.0 °C	1,794 mm	69	0
2000	36.0 °C23 November 2000	-0.7 °C14 July 2000	18.9 °C	1,854 mm	53	2
1999	36.2 °C26 December 1999	3.3 °C7 June 1999	18.7 °C	1,494 mm	49	0
1998	35.6 °C21 January 1998	3.8 °C26 June 1998	18.8 °C	2,492 mm	41	0
1997	36.0 °C7 January 1997	0.1 °C30 June 1997	19.4 °C	2,112 mm	55	0
1996	35.9 °C11 January 1996	-0.6 °C30 June 1996	18.9 °C	1,879 mm	55	1
1995	38.9 °C18 December 1995	-1.2 °C5 August 1995	19.2 °C	1,681 mm	70	1
1994	38.5 °C12 December 1994	0.2 °C11 July 1994	19.5 °C	1,738 mm	58	0
1993	35.0 °C11 November 1993	0.7 °C16 July 1993	19.0 °C	1,823 mm	56	0
1992	35.8 °C20 February 1992	0.1 °C3 August 1992	19.0 °C	1,763 mm	56	0
1991	35.5 °C15 October 1991	-2.2 °C14 July 1991	19.4 °C	1,576 mm	63	3
1990	36.6 °C15 November 1990	0.3 °C22 July 1990	18.8 °C	1,875 mm	51	0
1989	35.3 °C17 December 1989	2.4 °C1 August 1989	18.9 °C	1,483 mm	63	0
1988	35.7 °C26 March 1988	-0.5 °C9 July 1988	18.6 °C	1,520 mm	64	1
1987	36.1 °C1 December 1987	1.2 °C24 June 1987	19.1 °C	2,197 mm	55	0
1986	37.3 °C16 January 1986	3.4 °C14 May 1986	20.0 °C	1,712 mm	63	0
1985	39.7 °C16 November 1985	4.2 °C12 July 1985	19.8 °C	1,641 mm	62	0
1984	37.4 °C4 February 1984	2.3 °C16 May 1984	19.4 °C	1,949 mm	68	0
1983	35.2 °C30 December 1983	3.0 °C9 September 1983	19.1 °C	2,127 mm	47	0
1982	34.6 °C29 December 1982	3.9 °C29 May 1982	19.6 °C	1,477 mm	56	0
1981	34.7 °C18 February 1981	1.1 °C21 June 1981	19.5 °C	1,427 mm	43	0
1980	35.1 °C23 January 1980	0.9 °C1 August 1980	19.4 °C	1,600 mm	60	0
1979	37.2 °C11 February 1979	1.7 °C18 July 1979	18.6 °C	1,537 mm	60	0
1978	36.2 °C1 February 1978	1.1 °C6 June 1978	19.2 °C	1,389 mm	38	0
1977	35.5 °C16 February 1977	3.5 °C17 July 1977	20.1 °C	1,726 mm	67	0
1976	35.7 °C14 December 1976	0.4 °C10 July 1976	18.6 °C	1,664 mm	55	0
1975	36.4 °C15 November 1975	1.4 °C19 July 1975	19.0 °C	1,791 mm	43	0
1974	35.7 °C4 November 1974	1.8 °C17 August 1974	19.0 °C	1,462 mm	53	0
1973	35.4 °C12 January 1973	3.2 °C19 July 1973	19.2 °C	1,994 mm	53	0
1972	36.1 °C28 December 1972	0.9 °C14 July 1972	19.3 °C	2,197 mm	42	0
1971	36.3 °C20 December 1971	-0.8 °C17 June 1971	18.9 °C	1,691 mm	55	1
1970	36.5 °C27 December 1970	1.5 °C3 July 1970	19.3 °C	1,778 mm	65	0
1969	35.0 °C27 October 1969	2.4 °C19 June 1969	18.9 °C	1,539 mm	34	0
1968	36.9 °C14 December 1968	2.0 °C3 September 1968	18.8 °C	1,332 mm	62	0
1967	36.7 °C10 November 1967	-1.1 °C14 June 1967	19.2 °C	1,719 mm	42	1
1966	33.9 °C14 December 1966	1.4 °C1 July 1966	18.4 °C	1,811 mm	21	0
1965	34.9 °C1 February 1965	-0.9 °C12 July 1965	18.6 °C	1,720 mm	50	1
1964	34.8 °C3 March 1964	1.8 °C20 July 1964	18.3 °C	1,305 mm	50	0
1963	37.1 °C3 January 1963	2.0 °C7 August 1963	19.1 °C	1,797 mm	41	0
1962	35.4 °C28 November 1962	2.2 °C18 July 1962	18.0 °C	1,012 mm	48	0
1961	34.5 °C1 February 1961	0.3 °C17 June 1961	19.5 °C	1,559 mm	49	0
1960	34.2 °C23 January 1960	0.9 °C25 June 1960	18.5 °C	1,404 mm	52	0
1959	33.1 °C26 October 1959	2.6 °C11 June 1959	18.9 °C	1,721 mm	35	0
1958	35.8 °C7 January 1958	3.1 °C25 May 1958	18.9 °C	1,690 mm	31	0
1957	35.3 °C26 December 1957	1.4 °C3 August 1957	18.8 °C	1,657 mm	29	0
1956	34.7 °C5 February 1956	2.6 °C15 May 1956	17.9 °C	1,411 mm	10	0
1955	34.7 °C7 February 1955	0.2 °C8 July 1955	18.3 °C	1,663 mm	40	0
1954	32.9 °C11 January 1954	4.0 °C6 July 1954	18.9 °C	1,888 mm	26	0
1953	35.7 °C5 January 1953	3.6 °C31 July 1953	19.5 °C	1,474 mm	49	0
1952	37.0 °C27 December 1952	4.4 °C24 July 1952	18.9 °C	1,278 mm	43	0
1951	33.2 °C25 September 1951	2.8 °C6 July 1951	19.0 °C	1,328 mm	25	0
1950	33.5 °C12 December 1950	1.0 °C11 July 1950	18.6 °C	1,423 mm	39	0
1949	34.4 °C20 December 1949	0.9 °C16 August 1949	18.5 °C	1,393 mm	21	0
1948	32.8 °C25 September 1948	1.1 °C9 August 1948	18.9 °C	2,288 mm	14	0
1947	32.4 °C22 January 1947	1.1 °C11 July 1947	18.7 °C	1,524 mm	17	0
1946	32.6 °C16 February 1946	0.7 °C19 July 1946	18.8 °C	1,796 mm	22	0
1945	36.9 °C15 January 1945	2.1 °C24 June 1945	19.5 °C	1,228 mm	31	0
1944	34.8 °C1 January 1944	2.8 °C28 June 1944	20.2 °C	1,193 mm	54	0
1943	39.3 °C2 January 1943	3.6 °C4 August 1943	19.6 °C	990 mm	64	0
1942	38.9 °C26 November 1942	0.1 °C20 June 1942	19.1 °C	1,018 mm	61	0
1941	33.2 °C25 November 1941	1.2 °C28 June 1941	19.0 °C	1,834 mm	22	0
1940	34.9 °C14 January 1940	3.4 °C10 August 1940	19.2 °C	1,695 mm	36	0

Normals computed over complete calendar years 1940–2025.

A specific year

Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?

Year

Across the whole year

Average daily high

24.7 °C

+0.5 °C

Hot days (≥ 30 °C)

78 d/yr

+25

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1613 mm

-36 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	29.6 °C	+0.3 °C	75 mm	-89 mm
Feb	32.0 °C	+3.0 °C	89 mm	-49 mm
Mar	30.6 °C	+3.0 °C	42 mm	-81 mm
Apr	24.2 °C	-0.5 °C	115 mm	+2 mm
May	22.9 °C	+1.6 °C	161 mm	+44 mm
Jun	16.4 °C	-2.8 °C	231 mm	+100 mm
Jul	17.8 °C	-1.2 °C	81 mm	-46 mm
Aug	20.3 °C	-0.2 °C	94 mm	-41 mm
Sep	22.0 °C	+0.2 °C	252 mm	+85 mm
Oct	24.4 °C	+0.5 °C	114 mm	-53 mm
Nov	26.4 °C	+0.2 °C	119 mm	-13 mm
Dec	30.1 °C	+1.7 °C	241 mm	+106 mm

The year's extremes

Hottest day

38.1 °C

11 Feb 2025

Coldest day

0.6 °C

2 Jul 2025

Wettest day

57.1 mm

21 Sep 2025

Windiest day

29.8 km/h

28 Jul 2025

Strongest gust

64.8 km/h

20 Aug 2025

Hottest feels-like

44.1 °C

3 Mar 2025

Coldest feels-like

-2.3 °C

2 Jul 2025

Sunniest day

13.6 h

14 Dec 2025

What was the weather like that day?

Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.

Date

Frequently asked questions

What is the climate of Portão?

Portão has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 19.2 °C and it receives 1,649 mm of precipitation per year.

What is the hottest day ever recorded in Portão?

The hottest day measured in Portão between 1940 and 2025 was 16 November 1985, reaching 39.7 °C.

What is the coldest day in Portão?

The coldest day measured in Portão between 1940 and 2025 was 25 July 2009, at -2.4 °C.

Does it snow in Portão?

Almost never: Portão sees virtually no snow, with about 0 frost days per year.

Has the climate of Portão warmed?

Yes: Portão warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Portão?

The wettest day measured in Portão between 1940 and 2025 was 24 March 2010, with 107 mm of rain in 24 hours.

What was the windiest day in Portão?

The windiest day measured in Portão between 1940 and 2025 was 2 July 1983, with winds reaching 43.3 km/h.

What is the warmest month in Portão?

The warmest month in Portão is January (24.2 °C on average); the coldest is July (14.0 °C).

How much does it rain in Portão?

Portão receives on average 1,649 mm of precipitation per year, spread over about 146 rainy days.

Is it sunny in Portão?

Portão gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.

Are there tropical nights in Portão?

Yes: Portão has on average 57 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Portão?

In Portão, between 1940 and 2025, the highest apparent temperature reached 45.6 °C on 7 February 2014, and the lowest was -5.8 °C on 25 July 2009.

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